yes i was just looking at that thread awhile back. it looks like the 274b wont work in a "c" or so someone stated. i still dont know about the 5y3 in a "CS" but either way its not that big a deal. I dont have a "c" anymore so thats of little matter to me. just wondering as i didnt remember those combinations being mentioned before.

I just ordered a pair of the valve art 274b tubes for my new Select-EX, I deffinaltly prefer the nos rca tubes that grant gave me along with the ruby. I wanted to try one of the jan centron tubes as well but tubeman is out of stock. ill have to wait on those. does anyone know a decent place to get a mullard GZ32 without selling a car or house?

[quote author=mullman link=1142366672/0#1 date=1142368954]Someone had one of those, or maybe a Sophia?

Randy? [/quote]

Yep ..... I have both, actually 3 ..... an early production Valve Art, a Sophia solid plate and a Sophia mesh plate.

According to the spec sheet for a 274B, a Zen Select has too much capacitance to make this rectifier happy. It likes to see a lot less than the 40uf in the Select. Even so, there are quite a few Select owners that have used a 274B with absolutely no problems ..... myself included. It has been stated that the tube life might be shortened in a Select.

As to a Zen C, I don't remember reading anything about how well (or not) this would work ..... ???

I read a review of the full music 274b and the designer said that the tube likes to see a first cap value of 10uf or less. the reviewer said his amp ( a handmade 2a3 amp) said he changed this 20uf cap for a 6.8uf cap.

would that be ok to change in the select? and has anyone tried changing it?

AHHHHHHH.... lucky guy, but then maybe luck didnt have anything to do with it

well i got the Valve Art 274B last night. and it was late so i only got to listen to it for a little bit. didnt sound bad by any means. but it was just radio on the Dynaco. so ill do some more critical listening hopefully tonight.